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PDF Merge

Merge multiple PDF files into one document. Drag to reorder. Free online PDF merger — no upload to server, 100% client-side.

Live·100% in your browser — no upload
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Drop PDF files here or click to upload
Select multiple PDF files

What is PDF Merge

The PDF Merge tool combines several PDF files into a single document, right in the browser thanks to the pdf-lib library. You upload the files, reorder them as you like and get one PDF ready to download.

Merging happens locally: your PDFs are not uploaded to any server, so even confidential documents stay only on your device.

How it works

  1. Drag or select the PDF files to merge.
  2. Drag the thumbnails to set the page order.
  3. Press Merge All to build the single document.
  4. Download the resulting PDF.

Frequently Asked Questions

Are my PDFs uploaded to a server?
No. Merging happens entirely in the browser with pdf-lib. Files stay on your device, so you can merge confidential documents too.
Can I choose the order of the files?
Yes. After uploading you can drag the thumbnails to reorder them: the final PDF follows the order you set.
Is there a limit on the number or size of PDFs?
No artificial limit: the only constraint is your browser's memory. Merging many or heavy files may take a few extra seconds.

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